A stated idea or opinion that not everyone believes is true.

A claim refers to an assertion that something is true, to the action of stating or asserting that something is a fact, but usually without providing sufficient evidence or proof. Hope this helps you!

themselves

an intensive pronoun is a pronoun that ends in self or selves, such as himself, herself, themselves, yourself, ourselves. since band members is a third person plural, the correct intensive pronoun would be themselves. if the band was talked about as a collective noun, itself would be the appropriate intensive pronoun. intensive pronouns are used to add emphasis to the noun it's modifying which is why it directly follows it.

the answer is:

magna carta